I am afraid going back that far my memory is of a maybe, I could be confusing it with a Victor incident so better keep quiet. I do remember my next captain on Valiants broke two DV windows before he learned how to open them, ex Hunters don't you know. You had to be strong to fly the Valiant, you could fly it in manual below 250kts, indeed we had to when we had a double hydraulic failure between Singaporwe and Gan, Thank god for the all electric systems. How would a Vulcan faired?.